Animal litter box



FIG. 1 is a front perspective view of an animal litter box showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being the same as the side shown;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an animal litter box, as shown and described. 